Where is the BSurfaces project living now?
Even though the site is gone we still have the addon. In fact it comes with the default blender. Just search in the addons for bsurfaces. Or if you are looking for the code go to the addon folder in the blender directory 2.71\scripts\addons\mesh_bsurfaces.py.

There are still a few places to get info about Bsurfaces.


The blender wiki
Blenderartists
A great PDF linked from the blender wiki
A few videos from the creator of Bsurfaces on vimeo
Blender cookie tutorial on BSurfaces here.